I already suggested Kompass UK to you in another, similar thread. Their records contain links to the company Web sites.

yes, I saw it, it is very goodhave you researched similar sites? is it the most extensive?also the problem is I can't seem to find a way to filter results by country (I only need companies with UK presence)

I used to use paper Kompass directories when I was at work, and later used their online service via the Dialog host system. They offer a long-established and useful set of directories, usually one per country. We used industry-specific directories like the one produced annually by Polymers Paint Colour Journal more often, but for general queries Kompass was our first call.